Alpha-1-fetoprotein, or Alpha-fetoprotein, is a human gene encoded by AFP. It may also be known as: Alpha-1-fetoprotein; Alpha-fetoglobulin; AFPD; FETA; HPAFP. The encoded protein has an amino acid length of 609 and a mass of 68.7 kDa. Alpha-1-fetoprotein is a member of the ALB/AFP/VDB family. Homologs of this gene exist in other organisms, including: Rat, Frog, Chicken.